An interesting historical example of what you talk of--if philosophy and theory merely digs a deeper hole to dig out of, and if we should therefore be advised to not philosophize and theorize--is Wittgenstein.

A common theme throughout both his early and later work is the rejection of traditional philosophy and metaphysics. However, especially in his early work, he himself philosophizes in such a way, devising a metaphysical theory about the ultimate structure of language and the world (which he concludes is logical in nature). Throughout his life, despite his aversion to philosophy, he couldnt help but philosophize, whatever his definition of it might be.

Maybe we could take this as an example along the lines that, to an extent, we simply cannot help but theorize/ philosophize. We cannot help but think, whatever our definition of "thinking" might happen to be.

It is also interesting to note that many of those who consider themselves to be at some sort of peace are those who have, at least in one sense, "stopped digging" (though they may continue to "dig" towards something else). For instance, devout religious persons, though they strive towards an ever-improved religiousity (say, the attainment of Englightenment), they nonetheless have accepted something as TRUE. In other words, in at least one aspect of inquiry, they have come to a conclusion.

My question would be: do these example show something about human nature, and if they do, is it something that, given this nature, cannot be otherwise?